Break-away coupling



FIG. 1 is a side elevation of a break-away coupling with optional end flanges, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevation from arrow 3 of FIG. 1; and,

FIG. 4 is a cross-section on line 4--4 of FIG. 1. 

The ornamental design for a break-away coupling, as shown. 